https://www.pcgamer.com/football-manager-2018-steam-stats-soar-in-wake-of-world-cup/

Announced via Twitter, FM head honcho Miles Jacobson says Football Manager 2018 averages 500,000 hours per day on Steam, with 553,806 hours clocked yesterday alone. Jacobson says over 270 million hours have also been recorded since launch on Steam last year, and that its peak concurrent players yesterday was 67,524. 

Steam Charts identifies the same—and suggests peak concurrent numbers have jumped following this summer's World Cup.